MAUI new Apple requirements

Hi everyone, I suddenly get these errors from the Apple Transporter when uploading my MAUI app:

Asset validation failed (90270)
Unsupported toolchain. Packages submitted to the App Store must be created either through Xcode, or using the productbuild[1] tool, as described in "Submitting your Mac apps to the App Store." Packages created by other tools, including PackageMaker, are not acceptable. [SIS] (ID:...)

Asset validation failed (90259)
Bad Bundle Executable. You must include a valid CFBundleExecutable key in your bundle's information property list file. (ID: ...)

Any guidance on how to fix these issues?
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